Grinding and polishing wheel and mounting.



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GRINDUIG AND POLISHING WHEEL AND MUUNTING. (Application med sepa; 1"2,1809.',

(No Model.)

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JAMES II. ADAMSON, OF VEST MELBOURNE, VICTORIA.

GRINDING AND POLISHING WHEEL AND MOUNTING.

SPECIFICATION forming part Of Letters Patent N0. 647,063, dated April10, 1 900. Application led September l2, 1899. Serial No.730,20l. (Nomodel.)

To @ZZ wtom it may concern.-

Be it known' that I, J AMES H. ADAMsoN, a citizen of Victoria, residingat West Melbourne, in the county of Bourke, Colony of Victoria, haveinvented an Improvement in Grinding and Polishing Wheels and Mountings;and I hereby declare the following to be a full, clear, and exactdescription of the same.

My invention relates to improvements in cutting, grinding, or polishingwheels and in the mounting thereof, such as emery, tanite, corundum, orgrinding or cutting wheels of any material which has a tendency todisintegrate when running at a high speed.

It consists, essentially, in devices hereinafter described and claimedfor clamping and holding the Wheel in such a manner as to prevent thebreaking of the same by centrifugal action when running at a high rateof speed. It also comprises details, .of construction which will be morefully explained by reference to the accompanying drawings.

Dangerous accidents frequently occur in the use of grinding, cutting, orpolishing wheels and the like as now constructed by their bursting whilerunning at high speeds. It is the object of my invention to provide.inountings for such wheels by which they are reinforced and clampedtogether by the use of casings made of steel, iron, or other materialhaving a greater strength and in so arranging such clamping devices thatnew surfaces of the Wheel proper may be exposed as fast as it becomesWorn.

Referring to the accompanying drawings for a more complete explanationof my in vention, Figure l is an edge view of a Wheel having one at andone convex face and partial section of mountings. Fig. 2 is a sectionalview in the plane of the axis with double-convex Wheel and mountings.Fig. 3 is a face view of the same.

A represents the grindingwheel, which may be made of any grinding,cutting, or polishing material such as has been heretofore named orsuited to the purpose, and it may be made of any desired shape for thework to be done. These wheels are mounted and turnable upon a shaft orspindle B, and said wheels are in the form of truncated cones having thegreatest thickness nearest the center and being made thinner toward theperiphery,

as plainly shown. Either one or both sides may be made of this form.These wheels may be made with a hole through the center of sufficientsize to admit the shaft B, or preferably they may be made in the form ofannular rings having an opening of considerable diameter in the center.(See Fig. 2.) Upon each side of these wheels are fitted metal disks O,which are made concavo-eonvex, the concave sides corresponding in theirinclination with that of the wheel-surfaces. These disks are clampedfirmly against the inner portions of the wheels and secured by collarsor by screws c or by bolts c', passing through the holding-disks andthrough the hollow central portion of the wheel, with nut-s e, which maybe screwed upon the bolt,` so as to hold them iirmly in place. Outsideof these disks are a second series of annular disks D, fitting aroundthe periphery of the irst plates and with their inner peripheriesoverlapping them and the outer peripheries extending beyond and beingsimilarly concaved or shaped to fit against the Wheels'ontside of thefirst-named plates, and these outer disks are also secured either by thebolts c', which pass through the first plates, or, if desired, a secondseries of bolts may be employed. For the greatest strength the disksshould be not only firmly attached to each other, but also with the bossor central part.

In the present case I have shown the outer annular metal disks asoverlapping the interior ones to a distance which will allow a singleset of bolts to clamp both sets of disks. Any number of these disks maybe added, extending toward the periphery of the wheel and depending uponthe size thereof, it being designed to have them cover as much of theWheel as possible and leave' a sufficient surface exposed for the workto be done.

Whenever the Wheels have been worn down to the point near theclamping-disks, the exterior disks may be removed and, if necessary,other disks having a smaller exterior diameter may be substituted, thusagain clamp-` ing the material to the wheels to within ashort distanceof the periphery and so the wheels may be gradually Worn down to thepoint where it is necessary to discard them.

By making the wheels annular with the hol- IOO low central space I amenabled to make larger l Wheels With the same amount of material and tothus economize them so that they can be more nearly used up before beingdiscarded. The larger diameter also gives a more rapid travel of theperiphery when running the Wheel at any given speed, and the concaveclamping-plates secure them so that they cannot burst or iy apart.

Having thus described my invention, What I claim as new, and desire tosecure by Letters Patent, is-

l. A grinding and polishing Wheel having the sides converging from theportion nearest the center to the periphery, disks having faces adaptedto clamp the opposite sides of the v Wheel, a second series of disks oflarger diam etel-,the inner peripheries overlapping the firstnamed disksand the outer portion clamping the sides of the wheel outside of thefirst- J. II. ADAMSON.

Witnesses:

D. GRAY, O. SEIDEL.

